Measure indoor humidity
A cheap digital hygrometer, used in more than one room, tells you whether the air is in a range that makes mold less likely.
Moisture first
A drier home gives mold fewer places to start.
MoldSavvy is a practical guide to indoor humidity, condensation, and mold prevention. We start with moisture control — the step public-health agencies actually emphasize — and we’re honest about when a job is bigger than a bottle of cleaner.
What this site helps with
Stop winter window condensation
Wet glass is usually a humidity and surface-temperature problem. Wipe the sill, then fix the cause.
Cut everyday moisture
Bath fans, dryer vents, cooking exhaust, and a correctly used dehumidifier do more than most “mold sprays.”
Know when to call a pro
Small, surface-level problems are often DIY. Large, hidden, or lingering moisture is a job for a qualified contractor.
Latest articles
Ideal Indoor Humidity to Prevent Mold (and How to Measure It)
The EPA and CDC agree on a practical indoor humidity range. Here is what those numbers mean, how to measure them with a hygrometer, and what to do when a room is too damp.
How to Stop Condensation on Windows in Winter
Wet winter windows are usually a humidity and glass-temperature problem. Here is how to tell ordinary morning fog from real damage, and the fixes that actually work.